n = int(input())
ABC = list(map(int, input().split()))
S = list(input().split())

Slen = [0 for _ in range(n)]
for i in range(n):
    Slen[i] = len(S[i])

ans = 0
for i in range(n):
    ind = 0
    tmp = 0
    while i < n:
        tmp += Slen[i]
        if tmp == ABC[ind]:
            ind += 1
            if ind == 3:
                ans += 1
                break
            tmp = 0
        elif tmp > ABC[ind]:
            break
        i += 1
print(ans)